Re: [take24 0/6] kevent: Generic event handling mechanism.

Evgeniy Polyakov wrote:

Btw, what about putting aditional multiplexer into add/remove/modify
switch? There will be logical 'ready' addon?

Is it needed? Usually this is done with a *_wait call with a timeout of zero. That code path might have to be optimized but it should already be there.

It does not allow to mark events as ready.
And current interfaces wake up when either timeout is zero (in this case
thread itself does not sleep and can process events), or when there is
_new_ work - since there is no _new_ work, when thread awakened to
process it was killed, kernel does not think that something is wrong.

Rather than mark an existing entry as ready, how about a call to inject a new ready event?

This would be useful to implement functionality at userlevel and still use an event queue to announce the availability. Without this type of functionality we'd need to use indirect notification via signal or pipe or something like that.

--
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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